{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27810 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-27810 is a medium-severity vulnerability in kovidgoyal calibre, published on 27 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27810 and fix it if it is affected.\n\nWhat it is: CVE-2026-27810 is a medium-severity vulnerability in kovidgoyal calibre, published on 27 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27810 exists.\n\nAffected product: kovidgoyal calibre. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-27810/ (Markdown: https://insights.sbomify.com/CVE-2026-27810/index.md)","id":"CVE-2026-27810","markdown":"https://insights.sbomify.com/CVE-2026-27810/index.md","name":"CVE-2026-27810","record":{"aliases":["DEBIAN-CVE-2026-27810","GHSA-5fpj-fxw7-8grw","UBUNTU-CVE-2026-27810"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"e-book manager","requires_auth":"low_privilege","summary":"Authenticated users can inject arbitrary HTTP headers into calibre Content Server responses via unsanitized query parameters, potentially bypassing security controls.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"calibre","vendor":"calibre-ebook"}],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-113","name":"Improper Neutralization of CRLF Sequences in HTTP Headers"}],"description":"calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, an HTTP Response Header Injection vulnerability in the calibre Content Server allows any authenticated user to inject arbitrary HTTP headers into server responses via an unsanitized `content_disposition` query parameter in the `/get/` and `/data-files/get/` endpoints. All users running the calibre Content Server with authentication enabled are affected. The vulnerability is exploitable by any authenticated user and can also be triggered by tricking an authenticated victim into clicking a crafted link. Version 9.4.0 contains a fix for the issue.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"calibre Vulnerable to HTTP Response Header Injection","id":"CVE-2026-27810","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Roxy-WI has a Command Injection via diff parameter in config comparison allows authenticated RCE","id":"CVE-2026-27811"},"packages":[],"prev":{"headline":"psd-tools: Compression module has unguarded zlib decompression, missing dimension validation, and hardening gaps","id":"CVE-2026-27809"},"products":["calibre"],"published":"2026-02-27","related":[{"cvss_score":9.8,"headline":"Command injection in Calibre","id":"CVE-2011-4124","kev_date_added":null,"published":"2021-10-27"},{"cvss_score":9.8,"headline":"Privilege escalation in Calibre","id":"CVE-2011-4125","kev_date_added":null,"published":"2021-10-27"},{"cvss_score":9.3,"headline":"calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution","id":"CVE-2026-26064","kev_date_added":null,"published":"2026-02-20"},{"cvss_score":9.3,"headline":"calibre: Path Traversal can Lead to Arbitrary File Write and Potential Code Execution","id":"CVE-2026-26065","kev_date_added":null,"published":"2026-02-20"},{"cvss_score":8.6,"headline":"calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution","id":"CVE-2026-25635","kev_date_added":null,"published":"2026-02-06"},{"cvss_score":8.2,"headline":"calibre has a path traversal vulnerability","id":"CVE-2026-33206","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":8.2,"headline":"calibre has a Path Traversal Leading to Arbitrary File Corruption and Code Execution","id":"CVE-2026-25636","kev_date_added":null,"published":"2026-02-06"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-02","vendors":["kovidgoyal"]},"summary":"Authenticated users can inject arbitrary HTTP headers into calibre Content Server responses via unsanitized query parameters, potentially bypassing security controls.","url":"https://insights.sbomify.com/CVE-2026-27810/"}